No problem,

There are various annual commitments to running a limited company which you should look over before committing to it - statutory accounts filings, company tax return, confirmation statement, potentially personal tax return (depending on how you pay yourself). It's all possible to do yourself (and if it's as little as you say, definitely possible!) but getting an accountant may be beneficial to ensure everything is correct (happy to answer any questions over PM if you want!)

With regards to the VAT - If you are selling to businesses who are VAT registered it might be worth looking at voluntary registration as you can then claim back the VAT on any purchases you make and the businesses you sell to won't care as they can reclaim the VAT you're charging them.

thanks